GD Midea Refrigeration Equipment Elite Series Operating manual

GD Midea Refrigeration Equipment Co.,Ltd
SPLIT TYPE, HEAT PUMP AIR CONDITIONERS
Technical & service manual 2005
Elite Series R22 Wall Mounted
[Models]
MSE-21CR
MSE-21HR
MSE-24CR
MSE-24HR
MSE-28CR
MSE-28HR

1
Elite SERIES (R22)
Contents
1. Features………………………………………………………………… 02
2. Specification………………………………………………………..……03
3. Dimensions…………………………………………………………..… 05
4. Refrigeration cycle diagram……………………………………………07
5. Capacity table…………………………………………………………...08
6. Wiring diagram…………………………………………………..………13
7. Troubleshooting………………………………….………….…………..17
8. Electronic function…………………………………………………… .23
9. Characteristic of temp. sensor…………………………………………29

2
1.Features
1.1Compact design
1.2LED display

2.Specification
MSE-21CR MSE-21HR MSE-24CR MSE-24HR
Ph-V-Hz 220-240V~,50HZ 220-240V~,50HZ 220-240V~,50HZ 1, 220-240V~, 50Hz
Capacity Btu/h 21000 21000 24000 24000
Input W 2350 2350 2800 2800
Rated current A 10.7 10.7 12.5 12.5
EER Btu/w.h, w/w 8.9, 2.6 8.9, 2.6 8.6, 2.5 8.6, 2.5
Capacity Btu/h 25000 27000
Input W 2400 2800
Rated current A 11 12.5
COP W/W 3.0 2.8
L/h 2.2 2.2 2.3 2.3
W 2900 2900 2900 2900
A15151515
A66666666
Model PH420X3CS-4KU1 PH420X3CS-4KU1 PH420X3CS-4KU1 PH420X3CS-4KU1
T
yp
e Rotar
y
Rotar
y
Rotar
y
Rotar
y
Brand TOSHIBA TOSHIBA TOSHIBA TOSHIBA
Ca
p
acit
y
Btu/h 24990 24990 24990 24990
In
p
ut W 2430 2430 2430 2430
Rated current
(
RL A 11.3 11.3 11.3 11.3
Locked rotor Am
p
A 61/66 61/66 61/66 61/66
Thermal
p
rotector UP14RE5245
(
Intern
a
U
P14RE5245
(
Intern
a
U
P14RE5245
(
Intern
a
U
P14RE5245
(
Interna
Ca
p
acitor uF 50 50 50 50
Refri
g
erant oil ml SUNISO 4GSD 95
0
SUNISO 4GSD 95
0
SUNISO 4GSD 95
0
SUNISO 4GSD 950
Model YDK36-4C YDK36-4C YDK36-4C YDK36-4C
Brand Wellin
g
Wellin
g
Wellin
g
Wellin
g
In
p
ut W 65/64/62 65/64/62 65/64/62 65/64/62
Ca
p
acitor uF 2
μ
F/450V 2
μ
F/450V 2
μ
F/450V 2
μ
F/450V
S
p
eed
(
hi/mi/lo
)
r/min 200/1120/1080/100 200/1120/1080/100 200/1120/1080/100 200/1120/1080/100
0
m3/h 1080/1020/960/880 1080/1020/960/880 1080/1020/960/880 1080/1020/960/880
dB(A) 45/42/39 45/42/39 45/42/39 45/42/39
Dimension (W*H
*
mm 1080×330×225 1080×330×225 1080×330×225 1080×330×225
Packing (W*H*
D
mm 1165X445X320 1165X445X320 1165X445X320 1165X445X320
Net/Gross weight Kg 17/22 17/22 17/22 17/22
Model YDK53-6D YDK53-6D YDK53-6D YDK53-6D
Brand Welling Welling Welling Welling
Input W 140 140 140 140
Capacitor uF
Speed r/min 800 800 800 800
m3/h 2500 2500 2500 2500
dB(A) 55 55 55 55
Dimension(W*H*
D
mm 845X695X335 845X695X335 845X695X335 845X695X335
Packing (W*H*D mm 970X770X395 970X770X395 970X770X395 970X770X395
Net/Gross weight Kg 58/63 60/65 58/63 60/65
g R22/1450 R22/1900 R22/1450 R22/1900
MPa 2.6 2.6 2.6 2.6
Liquid side/ Gas
s
mm(inch) Ф9.53/Ф16.0 Ф9.53/Ф16.0 Ф9.53/Ф16.0 Ф9.53/Ф16.0
Max. refrigerant
p
m20202020
Max. difference i
n
m10101010
No No No No
No No No No
Electronic control Electronic control Electronic control Electronic control
℃17-30 17-30 17-30 17-30
℃18-45 -7 - 45 18-45 -7 - 45
m2 34~49 34~49 34~49 34~49
set 60/132/142 60/132/142 60/132/142 60/132/142
Model
Power supply
Cooling
Heating
Moisture Removal
Max. input consumption
Max. current
Starting current
Compressor
Indoor fan motor
Indoor air flow (Hi/Mi/Lo)
Indoor noise level (Hi/Mi/Lo)
Indoor unit
Outdoor fan moto
r
Outdoor air flow
Outdoor noise level
Outdoor unit
Refrigerant type R22(R407C)
Design pressure
Refrigerant piping
Ambient temp
Application area
Qty’per 20’ /40’ /40'HQ
Connection wiring
Plug type
Thermostat type
Operation temp
★1 The noise date is base on hemi-anechoic chamber, during actual operation, these values are normally somewhat different as a result of ambient
condition.
3

MSE-28CR MSE-28HR
Ph-V-Hz 220-240V~,50HZ 220-240V~,50HZ
Capacity Btu/h 28000 28000
Input W 3200 3200
Rated current A 15.0 15.0
EER Btu/w.h, w/w 8.7, 2.5 8.7, 2.5
Capacity Btu/h 31000
Input W 3200
Rated current A 15.0
COP W/W 2.8
L/h 2.8 2.8
W 3800 3800
A 20.0 20.0
A 100 100
Model ZR34KH-PFJ-522 ZR34KH-PFJ-522
T
yp
e Scroll Scroll
Brand Co
p
eland Co
p
eland
Ca
p
acit
y
Btu/h 28000 28000
In
p
ut W 2520 2520
Rated current
(
RL A 13.5 13.5
Locked rotor Am
p
A 90/100 90/100
Thermal
p
rotector 15HM1766
(
Internal
)
15HM1766
(
Internal
)
Ca
p
acitor uF 50 50
Refri
g
erant oil ml 1242 1242
Model YDK36-4C YDK36-4C
Brand Wellin
g
Wellin
g
In
p
ut W 70/66/63 70/66/63
Ca
p
acitor uF 3
μ
F/450V 3
μ
F/450V
S
p
eed
(
hi/mi/lo
)
r/min 250/1180/1110/105 250/1180/1110/1050
m3/h 1150/1080/1020/960 1150/1080/1020/960
dB(A) 47/44/41 47/44/41
Dimension (W*H
*
mm 1080×330×225 1080×330×225
Packing (W*H*
D
mm 1165X445X320 1165X445X320
Net/Gross weight Kg 17/22 17/22
Model YDK53-6D YDK53-6D
Brand Welling Welling
Input W 169 169
Capacitor uF 5 5
Speed r/min 800 800
m3/h 2500 2500
dB(A) 57 57
Dimension(W*H*
D
mm 845X695X335 845X695X335
Packing (W*H*D mm 970X770X395 970X770X395
Net/Gross weight Kg 67/72 69/74
g R22/1900 R22/1950
MPa 2.6 2.6
Liquid side/ Gas
s
mm(inch) Ф9.53/Ф16.0 Ф9.53/Ф16.0
Max. refrigerant
p
m20 20
Max. difference i
n
m10 10
No No
No No
Electronic control Electronic control
℃17-30 17-30
℃18-45 -7 - 45
m2 50~68 50~68
set 60/132/142 60/132/142
Ambient temp
Application area
Qty’per 20’ /40’ /40'HQ
Connection wiring
Plug type
Thermostat type
Operation temp
Outdoor unit
Refrigerant type R22(R407C)
Design pressure
Refrigerant piping
Indoor unit
Outdoor fan moto
r
Outdoor air flow
Outdoor noise level
Compressor
Indoor fan motor
Indoor air flow (Hi/Mi/Lo)
Indoor noise level (Hi/Mi/Lo)
Moisture Removal
Max. input consumption
Max. current
Starting current
Model
Power supply
Cooling
Heating
★1 The noise date is base on hemi-anechoic chamber, during actual operation, these values are normally somewhat different as a result of ambient
condition.
4

3.Dimensions
3.1 Indoor unit
MSE-21CR, MSE-21HR
MSE-24CR, MSE-24HR
MSE-28CR, MSE-28HR
5

3.2 Outdoor unit
MSE-21CR, MSE-21HR
MSE-24CR, MSE-24HR
MSE-28CR, MSE-28HR
12. 5
6

4.Refrigeration cycle diagram
7

8
5. Capacity table
5.1 MSE-21CR
SUMMER OUTDOOR TEMPERATURE DRY
Indoor
Conditions 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC
Total capacity kW 5.44 5.16 4.81 4.42 4.06 3.79
Sensitive capacity kW 3.80 3.69 3.53 3.34 3.18 3.04
21ºC D
15ºC W Input kW. 1.97 2.13 2.31 2.48 2.64 2.8188
Total capacity kW 5.83 5.58 5.25 4.93 4.61 4.33
Sensitive capacity kW 3.47 3.37 3.25 3.13 3.04 3.00
24ºC D
17ºC W Input kW. 1.97 2.16 2.34 2.52 2.70 2.90
Total capacity kW 6.24 6.12 5.80 5.35 4.87 4.44
Sensitive capacity kW 4.37 4.28 4.12 3.92 3.71 3.55
27ºC D
19ºC W Input kW. 2.01 2.20 2.38 2.58 2.76 2.95
Total capacity kW 6.59 6.46 6.37 6.15 5.87 5.58
Sensitive capacity kW 4.14 4.19 4.15 4.08 4.04 4.06
32ºC D
23ºC W Input kW. 2.00 2.22 2.44 2.66 2.88 3.10
5.2 MSE-21HR
SUMMER OUTDOOR TEMPERATURE DRY
Indoor
Conditions 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC
Total capacity kW 5.44 5.16 4.81 4.42 4.06 3.79
Sensitive capacity kW 3.80 3.69 3.53 3.34 3.18 3.04
21ºC D
15ºC W Input kW. 1.97 2.13 2.31 2.48 2.64 2.8188
Total capacity kW 5.83 5.58 5.25 4.93 4.61 4.33
Sensitive capacity kW 3.47 3.37 3.25 3.13 3.04 3.00
24ºC D
17ºC W Input kW. 1.97 2.16 2.34 2.52 2.70 2.90
Total capacity kW 6.24 6.12 5.80 5.35 4.87 4.44
Sensitive capacity kW 4.37 4.28 4.12 3.92 3.71 3.55
27ºC D
19ºC W Input kW. 2.01 2.20 2.38 2.58 2.76 2.95
Total capacity kW 6.59 6.46 6.37 6.15 5.87 5.58
Sensitive capacity kW 4.14 4.19 4.15 4.08 4.04 4.06
32ºC D
23ºC W Input kW. 2.00 2.22 2.44 2.66 2.88 3.10

9
WINTER OUTDOOR CONDITIONS
Indoor
Conditions 12ºC D
11ºC W 7ºC D 6ºC W 4ºC D 3ºC W 0ºC D -1ºC W -4ºC D -6ºC W -7ºC D -8ºC W
Capacity kW 8.30 7.38 6.53 4.22 3.53 3.40
15ºC Input kW. 2.94 2.63 2.35 2.03 1.88 1.74
Capacity kW 7.82 7.01 6.32 4.02 3.71 3.34
18ºC Input kW. 3.01 2.63 2.39 2.14 2.00 1.78
Capacity kW 7.78 7.08 6.26 3.82 3.43 3.35
20ºC Input kW. 3.08 2.70 2.45 2.15 2.04 1.81
Capacity kW 7.22 6.89 5.98 3.24 3.46 3.30
22ºC Input kW. 3.10 2.70 2.46 2.15 2.05 1.84
5.3 MSE-24CR
SUMMER OUTDOOR TEMPERATURE DRY
Indoor
Conditions 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC
Total capacity kW 6.57 6.25 5.81 5.34 4.90 4.57
Sensitive capacity kW 4.61 4.47 4.28 4.06 3.85 3.69
21ºC D
15ºC W Input kW. 2.30 2.50 2.71 2.95 3.13 3.35
Total capacity kW 7.04 6.73 6.35 5.94 5.55 5.22
Sensitive capacity kW 4.89 4.75 4.58 4.41 4.28 4.23
24ºC D
17ºC W Input kW. 2.30 2.52 2.75 2.98 3.21 3.44
Total capacity kW 7.54 7.40 7.00 6.45 5.87 5.37
Sensitive capacity kW 5.30 5.19 5.12 4.75 4.51 4.30
27ºC D
19ºC W Input kW. 2.34 2.58 2.80 3.05 3.29 3.52
Total capacity kW 7.98 7.80 7.69 7.42 7.08 6.73
Sensitive capacity kW 5.24 5.09 5.04 4.96 4.90 4.92
32ºC D
23ºC W Input kW. 2.41 2.59 2.87 3.15 3.42 3.70

10
5.4 MSE-24HR
SUMMER OUTDOOR TEMPERATURE DRY
Indoor
Conditions 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC
Total capacity kW 6.57 6.25 5.81 5.34 4.90 4.57
Sensitive capacity kW 4.61 4.47 4.28 4.06 3.85 3.69
21ºC D
15ºC W Input kW. 2.30 2.50 2.71 2.95 3.13 3.35
Total capacity kW 7.04 6.73 6.35 5.94 5.55 5.22
Sensitive capacity kW 4.89 4.75 4.58 4.41 4.28 4.23
24ºC D
17ºC W Input kW. 2.30 2.52 2.75 2.98 3.21 3.44
Total capacity kW 7.54 7.40 7.00 6.45 5.87 5.37
Sensitive capacity kW 5.30 5.19 5.12 4.75 4.51 4.30
27ºC D
19ºC W Input kW. 2.34 2.58 2.80 3.05 3.29 3.52
Total capacity kW 7.98 7.80 7.69 7.42 7.08 6.73
Sensitive capacity kW 5.24 5.09 5.04 4.96 4.90 4.92
32ºC D
23ºC W Input kW. 2.41 2.59 2.87 3.15 3.42 3.70
WINTER OUTDOOR CONDITIONS
Indoor
Conditions 12ºC D
11ºC W 7ºC D 6ºC W 4ºC D 3ºC W 0ºC D -1ºC W -4ºC D -6ºC W -7ºC D -8ºC W
Capacity kW 9.26 8.24 7.29 4.71 3.94 3.81
15ºC Input kW. 3.07 2.71 2.40 2.03 1.86 1.73
Capacity kW 8.72 7.82 7.05 4.48 4.13 3.76
18ºC Input kW. 3.15 2.71 2.45 2.18 2.09 1.77
Capacity kW 8.68 7.90 7.00 4.25 3.95 3.74
20ºC Input kW. 3.25 2.80 2.51 2.18 2.10 1.80
Capacity kW 8.07 7.68 6.67 3.61 3.86 3.68
22ºC Input kW. 3.28 3.00 2.82 2.47 2.26 2.13

11
5.5 MSE-28CR
SUMMER OUTDOOR TEMPERATURE DRY
Indoor
Conditions 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC
Total capacity kW 7.77 7.45 7.01 6.54 6.10 5.77
Sensitive capacity kW 5.81 5.67 5.48 5.26 5.05 4.89
21ºC D
15ºC W Input kW. 2.70 2.90 3.11 3.35 3.53 3.75
Total capacity kW 8.24 7.93 7.55 7.14 6.75 6.42
Sensitive capacity kW 6.09 5.95 5.78 5.61 5.48 5.43
24ºC D
17ºC W Input kW. 2.70 2.92 3.15 3.38 3.61 3.84
Total capacity kW 8.74 8.60 8.20 7.65 7.07 6.57
Sensitive capacity kW 6.50 6.39 6.32 5.95 5.71 5.50
27ºC D
19ºC W Input kW. 2.74 2.98 3.20 3.45 3.69 3.92
Total capacity kW 9.18 9.00 8.89 8.62 8.28 7.93
Sensitive capacity kW 6.44 6.29 6.24 6.16 6.10 6.12
32ºC D
23ºC W Input kW. 2.81 2.99 3.27 3.55 3.82 4.10
5.6 MSE-28HR
SUMMER OUTDOOR TEMPERATURE DRY
Indoor
Conditions 25ºC 30ºC 35ºC 40ºC 45ºC 50ºC
Total capacity kW 7.77 7.45 7.01 6.54 6.10 5.77
Sensitive capacity kW 5.81 5.67 5.48 5.26 5.05 4.89
21ºC D
15ºC W Input kW. 2.70 2.90 3.11 3.35 3.53 3.75
Total capacity kW 8.24 7.93 7.55 7.14 6.75 6.42
Sensitive capacity kW 6.09 5.95 5.78 5.61 5.48 5.43
24ºC D
17ºC W Input kW. 2.70 2.92 3.15 3.38 3.61 3.84
Total capacity kW 8.74 8.60 8.20 7.65 7.07 6.57
Sensitive capacity kW 6.50 6.39 6.32 5.95 5.71 5.50
27ºC D
19ºC W Input kW. 2.74 2.98 3.20 3.45 3.69 3.92
Total capacity kW 9.18 9.00 8.89 8.62 8.28 7.93
Sensitive capacity kW 6.44 6.29 6.24 6.16 6.10 6.12
32ºC D
23ºC W Input kW. 2.81 2.99 3.27 3.55 3.82 4.10

12
WINTER OUTDOOR CONDITIONS
Indoor
Conditions 12ºC D
11ºC W 7ºC D 6ºC W 4ºC D 3ºC W 0ºC D -1ºC W -4ºC D -6ºC W -7ºC D -8ºC W
Capacity kW 10.46 9.44 8.49 5.91 5.14 5.01
15ºC Input kW. 3.47 3.11 2.80 2.43 2.26 2.13
Capacity kW 9.92 9.02 8.25 5.68 5.33 4.96
18ºC Input kW. 3.55 3.11 2.85 2.58 2.49 2.17
Capacity kW 9.88 9.10 8.20 5.45 5.15 4.94
20ºC Input kW. 3.65 3.20 2.91 2.58 2.50 2.20
Capacity kW 9.27 8.88 7.87 4.81 5.06 4.88
22ºC Input kW. 3.68 3.40 3.22 2.87 2.66 2.53

6. Schematic diagram and wiring diagram
6.1 Schematic diagram
A0 1
A1 2
A2 3
GND 4 SDA
5SCL
6WC
7VCC
8
IC2 24C04
13
+5V
C3 104
R4
10K
R3
10K
SDA
SCL
C1
104
+5V R7 12K
1
2
3
IC1 KIA7042
RST
BUZ1
R9
1K
+12V
BUZ
E4
10uF/16V
R17
8.1K/1%
C9
104
R11 2K
D14
IN4148
D13
IN4148
+5V
1
2
CN7
T1_room
T1_room
E5
10uF/16V
R18
8.1K/1%
C11
104
R12 2K
D16
IN4148
D15
IN4148
+5V
1
2
CN8
T2_I.pipe
T2_I.pipe
C14
102 +5V
R8 1K
REC
L1
N
IN1
1
IN2
2
IN3
3
IN4
4
IN5
5
IN6
6
IN7
7
VSS
8VDD 9
OUT7 10
OUT6 11
OUT5 12
OUT4 13
OUT3 14
OUT2 15
OUT1 16
IC7
UJN2003
STEP_I2
STEP_I1
STEP_I3
STEP_I4
+12V
C12
104
1
2
3
4
5
CN11
SWING
RY6
HEAT N
RY7
HEAT L
HEAT
N
FUSE1
3.15A/250V
LOAD_HEAT L
LOAD_HEAT N
1
CN13
HEAT_ L
1
CN10
HEAT_ N
ZR1
14D681K
C16
0.1uF/275VAC
1
2
CN5
TRANS_IN
SW1
t
PTC1
82RM
R6
10K
C7
104
R5
10K
+5V
SW_TEST
SEG1
SEG2
SEG3
SEG4
+12V
C2
104
Vin
1
GND
2
Vout 3
IC3 7805 +5V
E3
470uF/16V
C8
104
D7
D3
D2
D1
+12V
E2
1000uF/25V
C6
104
IN4007*8
C5
104
E1
2200uF/25V
D8
D6
D5
D4
1
2
3
4
CN1
TRANS_OUT
1
2
CN2
POWER
L
L
RY5
FAN_IN H
+12V
L1
RY4
M
L1
RY3
L
L1
In_FanM
In_FanL
In_FanLL
In_FanH
In_FanM'
In_FanL'
In_FanLL'
In_FanH'
RY1
LL
L1
In_FanM'
In_FanL'
In_FanLL'
In_FanH'
1
2
3
4
5
CN6
CON5
N
HEAT'
HEAT'
R1
10K
+5V
Model
12VAC2
12VAC1
5VAC2
5VAC1
VSS
1
VDD
2
P25
3
P26
4
P00
5
P01
6
P02
7
P03
8
P04
9
VSS1
10
P05
11
P50
12
P51
13
P52
14
P53
15
AVDD
16
AVREF
17
ANI0
18
ANI1
19
ANI2
20
ANI3
21 ANI4 22
ANI5 23
AVSS 24
P10 25
P11 26
P30 27
P31 28
P32 29
P33 30
P20 31
VDD1 32
P21 33
P22 34
P23 35
P24 36
Vpp/IC 37
XT2 38
XT1 39
RESET 40
X2 41
X1
IC4
IC_UPD789166(42PIN)
42
In_FanM
In_FanL
In_FanLL
In_FanM
In_FanL
In_FanLL
SDA
SCL
RST
BUZ
T1_room
T2_I.pipe
REC
STEP_I2
STEP_I1
STEP_I3
STEP_I4
In_FanH
HEAT
SW_TEST
+5V
SEG1
SEG2
SEG3
SEG4
SCL
SDA
T1
T2
SW
BUZ
REC
Reset
X2
X1
SEG1
SEG2
SEG3
SEG4
+5V
+5V
Model
STEP_I1
STEP_I2
STEP_I3
STEP_I4
In_FanH
HEAT
X1R19
1M
C10
104
Model
TxD20
RxD20
R13
2K
Q1
9014
D9
IN4148
R14
2K
Q3
9014
D11
IN4148
R16
2K
Q5
9014
+12V
+12V
RXD20
TXD20
ZD1
IN4749
C15
473
E6
100uF/35V
D18 1N4007
C17
471/250v
C13
104
R24
5.1k C19
101
D17
1N4007
R27
4.7K
S
R22
3.5K/3W
R23
100K
N
R20
11K/2W
R21
11K/2W
L1
R25
330
TxD20
RxD20
+5V
IC6
PC851
IC5
PC817
R15 2k
+5
Q4
NPN R14
2k
C20
101
1
CN12
1
2
3
REC1
R19
150
C11
104
E7
47UF/16V
LED9
RUN
LED7
DEF.
LED6
AUTO
LED8
TIMER
ПФКѕ°еФ-АнНј
+5
C18
104
Dsa
1
Dsb
2
Q0 3
Q1 4
Q2 5
Q3 6
GND
7
CP
8
MR
9Q4 10
Q5 11
Q6 12
Q7 13
Vcc
14
IC8
74HC164
a
b
c
d
e
f
g h
com1 com2
DIS1
WT4021BG
R45 330
R46 330
R47 330
R48 330
R49 330
R54 330
R55 330
Q10
DTA143
Q9
DTA143
Q8
DTA143
SEG1
SEG2
+5
SEG3
REC1
+5
SEG4
SEG5
SEG5 SEG5
+5
C20
104
SEG5
REC1
J1
R2
10K
+5V
J2
EEPROM
EEPROM
J1 J2
АдЕЇ
УРµфµзјЗТд
ОЮµфµзјЗТд
µҐАд
ОЮ
УР
R59
10K
C17
101
1
2
3
4
5
6
7
8
CN9
E8
100UF/16V
R60
10K
C16
101

C10
104
14
+5V R11 12K
1
2
3
IC6 KIA7042
RST
CT1
0057U
D11
1N4148
R8
5.1K/1%
R10
1K/1%
R7
16K
E3
100uF/16V
D10
1N4148
R6 2K
C5
104
+5V
Current
L1
N
RL5
1
CN5
AC_N
L1
FUSE1
3.15A/250V
1
CN9
VALVE
1
CN8
COMP
ZR1
14D681K
C3
0.1uF/275VAC
1
2
CN6
TRANS_IN
t
PTC1
82RM
C15
104
R32
10K
+5V
С№Б¦їЄ№Ш
C11
104
ПаРтC
ПаРтB
T3
F_OUT2
С№Б¦їЄ№Ш
ПаРтCRX
TX
F_OUT2
RST
TX
Current
COMP
VALVE
F_OUT1
С№Б¦їЄ№Ш
+5V
µҐПаЖф¶Ї
ЗъЦбПд
ЦёКѕµЖ
N
Reset
X2
X1
RX
ПаРтA
ЗъЦбПд
µҐПаЖф¶Ї
+5V
CURRENT
ПаРтB
COMP
VALVE
F_OUT1
ПаРтA
T3
X1
R12
1M
C7
104
+5V
Vin
1
GND
2
Vout 3
IC1 7805 +5V
E2
470uF/16V
C2
104
D4
D3
D2
D1 +12V
E1
1000uF/25V
C1
104
IN4007*8
1
CN4
AC_L
1
CN11
F_OUT2
1
CN10
F_OUT1
E4
10uF/16V
R5
8.1K/1%
C6
104
R9 2K
D9
IN4148
D8
IN4148
+5V
T3
1
2
3
4
CN2
T3
R4
10K
RL4
+12V
L1
RL3
L1
RL2
L1
RL1
L1
5VAC1
5VAC2
1
2
3
CN1
TRANS_OUT
P
123/INTP0
P24/INTP1
2
P25/INTP2
3
AVDD
4
P60/AN10
5
P61/AN11
6
P62/AN12
7
P63/AN13
8
AVSS
9
P50
10 IC 19
X2 20
X1 21
VSS 22
VDD 23
P10 24
P11 25
P20/ASCK20 26
P21/TxD20 27
P 0 28 22/RxD2
P51
11
P52
12
P53
13
P00
14 P01 15
P02 16
P03 17
RESET 18
IC2 IC/UPD78F9116
LED1
R24
68K/2W
D14
4007
IC3
PC817 R22
5.1K
R19
2K
R16
10K
C8
104
+5V
ПаРтA
ПаРтA
R25
68K/2W
D15
4007
IC4
PC817 R23
5.1K
R20
2K
R17
10K
C9
104
+5V
ПаРтB
ПаРтB
R18
10K
+5V
ПаРтC
ПаРтC
1
2
3
4
CN14
1
CN15
F1
1
CN16
F2
1
CN13
ЗъЦбПд
C4 333
R3
51/1W
1
2
CN7
1
2
CN12
IC8
PC851
IC7 PC817
RX
TX
1
CN3 S
N
J9
R27
2K
R29
5.1K
D18
1N4007
C12
104
R35
5.1K
C18
101
R31
3.5k/3W
C13
471/250V
+5V
TX
RX
N
Q5
9014
Q4
9014
Q2
9014
Q1
9014
Q3
9014
R1
2k
R2
2k
R15
2k
R14
2k
R13
2k
D5
4148
D6
4148
D7
4148
D13
4148
D12
4148
COMP
VALVE
F_OUT1
F_OUT2
ЗъЦбПд
Q6
9014
R30
2k
D17
4148
µҐПаЖф¶Ї
С№Б¦їЄ№Ш
COMP
VALVE
F_OUT1
F_OUT2
ЗъЦбПд
µҐПаЖф¶Ї
R39 330
R28
2k
R38
330
+5
Q7
NPN
C17
101
L
L
J10

6.2 Wiring diagram
6.2.1 Cooling only
MSE-21CR, MSE-24CR, MSE-28CR
CN2
CN9
CN1
CN10
M
~
SWING SWING
UNIT2
CN6
CN7
C
N
5
Y/ G
RED Y/G WHITE
BLUE
FUSE 3. 15A/ 250V
FAN1
TRANS1
CAP1
XT1
RT2
RT1
TO OUTDOOR UNIT
UNIT1
1S
WIRING DIAGRAM
(INDOOR UNIT)
XS2XP2
CN8
CN11
AG
CN1
CN4
CN3
UNI T1
CN5
CN8
CN6
TO INDOOR UNIT POWER SUPPLY
CN1 0
CN1 1
CN2
15

6.2.2 Heating/cooling
MSE-21CR, MSE-24CR, MSE-28CR
CN2
CN9
CN1
CN10
M
~
SWING SWING
UNIT2
CN6
CN7
C
N
5
Y/ G
RED Y/G WHITE
BLUE
FUSE 3. 15A/ 250V
FAN1
TRANS1
CAP1
XT1
RT2
RT1
TO OUTDOOR UNIT
UNIT1
1S
WIRING DIAGRAM
(INDOOR UNIT)
XS2XP2
CN8
CN11
AG
CN4
CN3
UNI T1
CN2
CN5
CN6
CN1 1
TO INDOOR UNIT POWER SUPPLY
CN10
CN9
CN8
CN1
16

17
7.troubleshooting
The following tables will help to find where error happened (LED on indoor unit):
For models adopting electrical function (part I) (cooling only models):
Failure phenomenon Operation
lamp
Timer
lamp
Indoor fan speed has been out of control for
over 1 minute ☆X
Indoor room temp. or evaporator sensor is
open circuit or short circuit ☆On
Over current protection of the compressor
occurs 4 times X ☆
EEROM error On ☆
No over-zero signal ☆☆
For models adopting electrical function (part I) (reverse cycle models):
Failure phenomenon Operation
lamp
Timer
lamp
Defrosting
lamp
Over current protection of the compressor
occurs 4 times ☆X ☆
Indoor fan speed has been out of control for
over 1 minute X ☆☆
No over-zero signal ☆☆☆
Temp. sensor on indoor evaporator is open
circuit or short circuit X X ☆
Indoor room temp. sensor is open circuit or
short circuit X ☆X
EEROM error On ☆X
For models adopting electrical function (part II):
Failure phenomenon Operation
lamp
Timer
lamp
Defrosting
lamp
Auto lamp
Over current protection of the compressor
occurs 4 times ☆☆☆☆
Indoor room temp. sensor is open circuit or
short circuit X ☆X X
Temp. sensor on indoor evaporator is open
circuit or short circuit ☆X X X
Temp. sensor on outdoor condenser is open
circuit or short circuit (without for cooling only
models)
X X ☆X
Outdoor unit protects(outdoor temp sensor,
phase order etc) X X ☆☆

EEROM error X ☆X ☆
Indoor unit communication err X X X ☆
rExtinguish ☆Flash at 5Hz
Currentprotection
(LED indicates)
Check the indoor
air filter.
Does outdoo r heat-
exchanger fr osted?
No
It is n orma l under
that ambient temp.
Che ck t he
dra inage
sys tem of
out door unit.
Yes
Does ind oor heat-
exchanger frosted?
Yes
Check speed
of indoor
motor.
Yes
No
Does the outdoor
temp over 48 C?
o
Check the outdoor
condenser.
D oes it occur in
C ool mode?
Check speed
of outdoor
motor.
Yes
Check theover-
current protector of
compressor.
No
Re place the
ma in PCB board.
Replace the
compressor.
Recycle the
refrigerant
and recharge .
No
Does the indoor
temp low than 10 C?
o
Yes
No
Checkthe solenoid
coil of reverse valve.
C heckthe ove r-
c urrent protector of
compressor.
Replace th e
mainPCB board.
Recycle the refrige-
rant and recharge.
R eplace the re verse
valve.
Checktheposition
and wiring of tem p
sensor (all of the m).
If wro ng, the unit w ill
result in current
prote ction, not tem p.
C heck the soft
starter mould.
Check the soft
starter m ould.
18

T he unit does not
operate
Does the power LED
light after turning
the switch on?
C heck the electrical
source.
No
Check the power
supplier.
Does the voltage
betweeninpu t
terminates o f
transformer i s
correct?
Does the voltage
betwee noutp ut
terminates o f
transformer i s
correct?
D oes the power
tr ansfer to the
di sp lay boa rd ?
Replace the ma in
PCB board.
Yes
Yes
No
Checkwiring.
Replace the
transformer.
No
No
Do th e LED lamps
indicates ERR?
Ye s
Per f orm
the related
inst ructions.
Yes
No
Is th ere beep from
the unit when using
remoter?
Ch ec k t he soft
starter
Checkthebattery
of the remoter.
No
Check thedispla y
board.
Replace the
display board.
Yes
No
Replace the
disp lay boa rd .
Yes
Ye s
Does the unit run in
Forced Cool mode?
Abnormalnoise
from the indoorunit
Does it happe n in
Fan Onlymode?
Yes No
Does it happ en with
auto swing?
Check the
swing motor.
Yes
Check the
swing louver.
Check the fan
motor.
No
Check the cross flow
fan .
Replace the bear.
Does it just happen
in the beginning of
cooling or heating
mode?
It is because
of the heat
rub be tween
plastics parts.
It is n orma l.
Yes
Check the inp ut
and output pipe.
No
R ecycle the ref rige-
rant andrecharge.
Abnormalnoise
from the outdoor
unit
Does it happen in
Cool mode?
Yes
Do the fan blade rub
with the shroud?
C h ec k t he
motor.
Yes
C h ec k t he
fan blad e. C heck t he fixing nuts
of outdoor unit.
No
Check the
motor
supporter.
Check the capillary.
C heck the
compressor.
No
Recycle therefrig e-
ran t and recharge.
19